Global Patent Index - EP 1455497 A3

EP 1455497 A3 20040915 - Mobile communication terminal using both a continuous and an intermittent pilot for channel estimation

Title (en)

Mobile communication terminal using both a continuous and an intermittent pilot for channel estimation

Title (de)

Mobiles Kommunikationsendgerät welches sowohl ein kontinuierliches als auch ein intermittierendes Pilotsignal zur Kanalschätzung verwendet

Title (fr)

Terminal mobile de communication utilisant un signal pilote continu ainsi qu'un signal pilote intermittant pour l'estimation de canal

Publication

EP 1455497 A3 20040915 (EN)

Application

EP 04012439 A 20020319

Priority

  • EP 02251943 A 20020319
  • JP 2001264603 A 20010831

Abstract (en)

[origin: EP1289216A1] The invention provides a mobile communication terminal for a CDMA system which uses both a continuous pilot signal and an intermittent pilot signal for phase error detection and correction to assure synchronous detection. The apparatus includes a first pilot signal despreading section (22-1...22-3) for despreading a first continuous pilot signal spread with a spread code different from a spread code of a communication channel, a second pilot signal despreading section (26-1...26-3) for despreading a second intermittent pilot signal inserted in a data signal and spread with a spread code same as the spread code for the data signal, first and second pilot demodulation sections (23a,23b), and first and second respective phase error estimators (23c,23d) producing phase error amounts that are wheighed (23b) according to the relative signal strengths (23e,23f) with which the first and second pilots have been received (23g,23i). <IMAGE>

IPC 1-7

H04L 25/02; H04B 1/707

IPC 8 full level

H04B 1/707 (2011.01); H04B 1/712 (2011.01); H04B 7/26 (2006.01); H04L 25/02 (2006.01); H04L 27/233 (2006.01); H04W 56/00 (2009.01); H04W 76/02 (2009.01); H04W 88/02 (2009.01)

CPC (source: EP)

H04L 25/0232 (2013.01); H04L 27/2332 (2013.01)

Citation (search report)

  • [A] EP 1065800 A1 20010103 - LUCENT TECHNOLOGIES INC [US]
  • [A] USUDA M ET AL: "OPTIMIZING THE NUMBER OF DEDICATED PILOT SYMBOLS FOR FORWARD LINK IN W-CDMA SYSTEMS", VTC 2000-SPRING. 2000 IEEE 51ST. VEHICULAR TECHNOLOGY CONFERENCE PROCEEDINGS. TOKYO, JAPAN, MAY 15-18, 2000, IEEE VEHICULAR TECHNOLGY CONFERENCE, NEW YORK, NY : IEEE, US, vol. VOL. 3 OF 3. CONF. 51, 15 May 2000 (2000-05-15), pages 2118 - 2122, XP000968378, ISBN: 0-7803-5719-1

Designated contracting state (EPC)

DE FR GB

DOCDB simple family (publication)

EP 1289216 A1 20030305; EP 1289216 B1 20050209; DE 60202914 D1 20050317; DE 60202914 T2 20050721; EP 1455497 A2 20040908; EP 1455497 A3 20040915; JP 2003078959 A 20030314; JP 4448633 B2 20100414; US 2003043775 A1 20030306; US 7421010 B2 20080902

DOCDB simple family (application)

EP 02251943 A 20020319; DE 60202914 T 20020319; EP 04012439 A 20020319; JP 2001264603 A 20010831; US 10727202 A 20020326